Patents Assigned to Research by Copperhead Hill, Inc.
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Patent number: 7168450Abstract: An adaptive fitting for valves. The adaptive fitting has a fitting body having a first end and a second end. The fitting body defines an inner passageway extending from the first end of the fitting to the second end. The fitting is provided with a valve-engaging portion disposed on the first end of the fitting body. This valve-engaging portion has a threaded region for threadably engaging a threaded section of a valve. On the second end of the fitting body is disposed a sealing portion. The fitting is provided with one or more ports disposed about or near the first end of the fitting body for allowing flow there through.Type: GrantFiled: March 10, 2004Date of Patent: January 30, 2007Assignee: Research by Copperhead Hill, Inc.Inventor: Robert D. Dulin
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Patent number: 6892747Abstract: A temperature and pressure sensitive valve is disclosed herein. The valve has a valve piston for regulating flow through the valve, a valve piston guide for directing movement of the piston, the piston guide having one or more passages there through, a thermal element for enabling movement of said piston, and an elongated housing having an anterior and posterior end and an interior wall able to house the piston, guide and thermal element. The housing further has two or more passages able to aid the piston in regulating flow, with at least one of the passages placed towards the anterior end of the housing, and at least one of the passages placed towards the posterior end of the housing.Type: GrantFiled: February 10, 2003Date of Patent: May 17, 2005Assignee: Research by Copperhead Hill, Inc.Inventor: Robert D. Dulin
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Patent number: 6644345Abstract: A flow control valve is disclosed having a cylindrical housing having inlet and outlet ends and a central portion there between; a piston slidably disposed within the central portion and having a wall at one end thereof; a piston rod having a base and a top, a filter located within the rod, and a spring surrounding the rod for urging the rod and the piston toward the inlet end; and a flow restrictor through which the rod is able to pass. The flow restrictor has a first portion with one or more inlet ports and a second portion separated from the first portion by an annular ridge.Type: GrantFiled: June 24, 2002Date of Patent: November 11, 2003Assignee: Research By Copperhead Hill, Inc.Inventor: Robert Dulin
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Patent number: 6530391Abstract: A temperature and pressure sensitive valve is disclosed herein. The valve has a valve piston for regulating flow through the valve, a valve piston guide for directing movement of the piston, the piston guide having one or more passages there through, a thermal element for enabling movement of said piston, and an elongated housing having an anterior and posterior end and an interior wall able to house said piston, guide and thermal element. The housing further has two or more passages able to aid the piston in regulating flow, with at least one of the passages placed towards said anterior end of the housing, and at least one of the passages placed towards said posterior end of the housing.Type: GrantFiled: August 31, 2001Date of Patent: March 11, 2003Assignee: Research by Copperhead Hill, Inc.Inventor: Robert D. Dulin
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Patent number: 6408870Abstract: A flow control valve is disclosed having a cylindrical housing having inlet and outlet ends and a central portion there between; a piston slidably disposed within the central portion and having a wall at one end thereof; a piston rod having a base and a top, a filter located within the rod, and a spring surrounding the rod for urging the rod and the piston toward the inlet end; and a flow restrictor through which the rod is able to pass. The flow restrictor has a first portion with one or more inlet ports and a second portion separated from the first portion by an annular ridge.Type: GrantFiled: August 31, 2001Date of Patent: June 25, 2002Assignee: Research by Copperhead Hill, Inc.Inventor: Robert D. Dulin